20 January 2012 Nanophotonics devices based on magnetic materials
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Abstract
Magneto-optics and nanophotonics offer promising developments for applications in various technological sectors like data manipulation and storage, bio-imaging or optical sensors. Towards such purposes we show that it is advantageous to combine ultrafast magnetism performed with ultrashort laser pulses together with nanophotonics performed on various magnetic materials. Firstly, we discuss the important physical mechanisms underlying the control of magneto-optical nanodevices with femtosecond laser pulses. Secondly, we give examples of magneto-optical patterning which can be used for switching or for realizing diffractive magneto-optics. For example, individual ferromagnetic CoPt3 dots can be manipulated at the femtosecond time scale using confocal magneto-optical Kerr microscopy. Alternatively one can pattern such dots and control their size and shape. Patterning magnetic arrays on ferromagnetic metals with light pulses is also potentially very attractive for diffractive structures. Thirdly, we describe the advantages of performing coherent magneto-optics. In particular, transparent magnetic materials like Garnets are well adapted for making self diffractive magneto-optical devices.
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Jean-Yves Bigot, Jean-Yves Bigot, Mircea Vomir, Mircea Vomir, Marie Barthélémy, Marie Barthélémy, Michele Albrecht, Michele Albrecht, Abdelghani Laraoui, Abdelghani Laraoui, } "Nanophotonics devices based on magnetic materials", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82682U (20 January 2012); doi: 10.1117/12.915653; https://doi.org/10.1117/12.915653
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